[Test-Equipment] WTD: Help with old scope problem

[J. Forster]

Hi Joe,

I just downloaded it but my Irfan View does not have the DejaVu PI. I'm
looking.

Best,

-John

==============

> Thank you John,
> I understand that there is a copy of he manual available at
> http://bama.edebris.com/manuals/tek/310a, it is in DejaVu format so you
> may
> need an image viewer (Irfan View or Xn View).
> If you cannot access it, I'll be happy to have the schematics from my
> manual
> copied and sent to you. It would be a small price to pay if it helps to
> bring the scope back to like.
> Joe
>
> ----- Original Message -----
> From: "J. Forster" <jfor at quik.com>
> To: "Discussion of Electronic Test Equipment"
> <test-equipment at mailman.qth.net>
> Sent: Friday, October 08, 2010 11:20 AM
> Subject: Re: [Test-Equipment] WTD: Help with old scope problem
>
>
>> Joe,
>>
>> Do you have a link to the schematic? I'll be happy to take a look, but
>> couldn't find the print in a quick search.
>>
>> Best,
>>
>> -John
>>
>> ===============
>>
>>
>>> Joe,
>>>
>>> If you don't get any horizontal movement even from the external inputs
>>> then
>>> the problem is between them and the CRT deflection plates.  As the
>>> vertical
>>> works, the problem must be in the horizontal amp.  But I wouldn't know
>>> whether that is one stage or several.
>>>
>>> In a message dated 10/8/2010 12:55:48 PM Central Daylight Time,
>>> josepho at shaw.ca writes:
>>>>
>>>> Thank you Bob, the rest of the messages received agree with a problem
>>>> on
>>>> the
>>>> horizontal sweep, question what is the guilty component?
>>>> Joe
>>>> ----- Original Message -----
>>>> From: <WA5CAB at cs.com>
>>>> To: <test-equipment at mailman.qth.net>
>>>> Sent: Thursday, October 07, 2010 4:05 PM
>>>> Subject: Re: [Test-Equipment] WTD: Help with old scope problem
>>>>
>>>>
>>>> >Joe,
>>>> >
>>>> >I'm not familiar with the 310 but your last point (spot splits in
>>>> two)
>>>> is
>>>> >consistant with loss of horizontal sweep.  The cal signal is a square
>>>> >wave.
>>>> >The vertical amp is still moving the trace up and down as it should.
>>>> >
>>>> >In a message dated 10/7/2010 5:55:42 PM Central Daylight Time,
>>>> >xyzzypdx at gmail.com writes:
>>>> >>>Hello
>>>> >>>For a number of years Ihave been using a Tek 310A on my bench. I
>>>> like
>>>> it
>>>> >>on spite of its age and limited BW because of its small size and
>>>> sharp
>>>> >>trace. Recently,after not have been used for some months, presnted a
>>>> >>number of
>>>> >>problems.
>>>> >>>- There is no horizontal trace, only a spot.
>>>> >>>- The spot can be moved in both directions (V&H).
>>>> >>>- The focus control has only limited effect on the spot.
>>>> >>>- The intensity control has no effect on it.
>>>> >>>- The tubes related to the horizontal and sweep sections check OK.
>>>> >>>- There are no broken, burnt or overheated components.
>>>> >>>- LV voltages are OK but I cannot get a reading on the HV test
>>>> point
>>>> >>(5642 rectifiers).
>>>> >>>- If I apply a signal from the voltage calibrator, the spot splits
>>>> on
>>>> >>two.
>>>> >>>Any suggestions as to the cause of these problems (and fixes) will
>>>> be
>>>> >>greatly appreciated.
>>>> >>>Thanks
>>>> >>>Joe Orgnero  VE7LBI
>>>> >>
>>>>
>>>
>>> Robert & Susan Downs - Houston
>>> wa5cab dot com (Web Store)
>>> MVPA 9480
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>>
>>
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